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Geo 101  detailed

Geo 101 detailed



Detailed powerpoint presentation of the basic principles, descriptions and applications of geosynthetic products in the alberta market.

Detailed powerpoint presentation of the basic principles, descriptions and applications of geosynthetic products in the alberta market.



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    Geo 101  detailed Geo 101 detailed Presentation Transcript

    • Geosynthetics 101
    • Geosynthetics…..
      Geosyntheticsis the catch all term used to describe a range of generally synthetic products used to solve geotechnical problems or as system with natural earth materials. The term is generally regarded to encompass five main products:
      geomembranes and geocomposites
      Erosion and Sediment Control
      MSE (Mechanically Stabilized Earth) Walls
    • Why Do We Use Geosynthetics?
      Geosynthetics are environmentally friendly.
      Save on gravel costs, fuel costs, machine time and costs over conventional construction methods.
      Geosynthetics save money.
      Reduced labor costs lead to reduced construction times and costs.
      The use of geosynthetics in applications results in increased life cycles, traffic benefit ratios (for roads) which have long term economic benefits (reduced rutting, reinforced roads, etc.).
    • Roles of Geosynthetics…
    • Applications…..
      The role of geosynthetics are:
      • Separation,
      • Filtration,
      • Reinforcement,
      • Drainage,
      • Containment
      Different geosynthetics are suited to the various applications, as illustrated here.
    • Some of the typical uses of Geosynthetics in Applications are shown here.
    • Industries Served
      Oil and Gas
      Industrial / Mining
      Municipal / Transportation
      Landscape / Irrigation
      Many others……..
    • Products
      Erosion and Sediment Control
      Retaining Wall systems
      On what geosynthetics are?
    • Geotextiles….
      Geotextile Applications - Woven
      Erosion Control
    • Woven Geotextiles
    • Uses of Woven Geotextiles
      Separation application
      roadbuilding (general use)
      paved and unpaved infrastructure
      roadbuilding - paved and unpaved
      High surface loads i.e.. Parking lots, runways
    • Uses of Woven Geotextiles
      Sediment Control application
      silt fences
      CB inlet devices
    • Geotextile….
      Geotextiles Applications - NonWoven
      Sub-surface drainage
      Erosion Control
      Geomembrane Protection
    • Non Woven Geotextiles
    • Uses of Non-Woven Geotextiles
      drainage application
      french drains, pipe sock
      MSE walls
      separation application
      roadbuilding (specific conditions)
      parking lots (specific conditions)
      remediation projects
      weed barrier
    • Uses of Non-Woven Geotextiles
      Non-woven (cont’d)
      erosion control application
      Bridge abutments
      underlay for hard armor EC i.e.. Rip Rap
      protective underlay application
      installed above and/or below geomembranes in landfills, lagoons, SW ponds, etc.
    • Typical French Drain Application
      About Woven or NonWoven Geotextiles??
    • Geogrids……
      Geogrids: These are discernibly stiffer than geotextiles and have relatively large voids within the material. Methods of production vary but include extrusion, bonding or interlacing. They can be produced from nearly all polymeric materials.
    • Types of Geogrids
      Geogrids are rated based on properties.
      Biaxial – strength in two directions
      Uniaxial – strength in one direction -
    • Biaxial vs. Uniaxial
      Biaxial – strength in two directions or axes. Typically for point load applications.
      Uniaxial – strength in one direction (axes), typically in reinforced earth applications.
      About Geogrids?
    • Erosion and Sediment Control
      Blankets, TRM’s,
      silt fence,
      CB doughnuts and others
      Roadside slopes,
      drainage channels,
      and landscaping
      Commonly used b/c of increasing regulations
    • Uses and types of Erosion and Sediment Control
      Rolled Erosion Control Products (RECP)
      Erosion Control Blankets (ECB)
      they have different designs for use on different slopes and conditions
      they hold top soil in place and accelerate vegetative growth
      they help the natural process of erosion control take place after we disturb it
    • Rolled Erosion Control (ECB’s)
    • Uses and types of Erosion and Sediment Control
      Turf Reinforcement Mats (TRM’s)
      subsurface application that supports the vegetation’s root system
      used in medium to heavy runoff/discharge slopes and channels
      used when the natural vegetation limits are NOT exceeded
    • Uses and types of Erosion and Sediment Control
      High Performance TRM’s (HPTRM’s)
      subsurface application - slopes and channels with high flow/discharge
      used when natural vegetation limits can not support the system
      can and will replace hard armor systems at enormous cost savings
    • Uses and types of Erosion and Sediment Control
      Sediment control
      control soils that have already been displaced
      catch basin inlet devices (doughnuts and backers)
      silt fence
      straw wattles
      turbidity curtains
    • Silt Fence Installation
      About Erosion and Sediment Control?
    • Reinforced Earth Applications
      Part I
      Retaining walls are most common application
      Fundamental design theory, reinforced earth is independent of facing systems that are used (Lock Block, Keystone™, Allan Block™, Pisa Stone™, etc. etc.)
    • Reinforced Soil Mass
    • Cost of SRW (Segmented Retaining Wall) Comparison
      Cost comparison of segmental retaining walls is lower when compared with other leading type of wall systems.
    • Keystone Wall Project
      Application: High Point, Kelowna
      PET UX geogrids, with Keystone™SRW facing
      Wall heights of up to 38 feet
      Kelowna, BC
      6”- coarse blast rock backfill
    • Keystone Wall Project - Cont’d
      Durability Testing was carried out specifically for this type of backfill.
      Test results showed that installation damage reduction factors for these grids was far belowindustry standards for polyester grids.
      On retaining walls?
    • Part II
      Soft Soil Conditions
      Roads & Highways
      Base Reinforcement
    • SOFT or POOR SOIL conditions
      Roles are predominantly reinforcement, separation or drainage
      – roads, building foundations, pile cap reinforcements
      Typical specifications are woven geotextile or biaxial grids in these applications
      Can be used to reduce costs significantly in resource road applications where granular or solid material is at a premium
      Base Reinforcement Applications
    • Foundation conditions in a marine silt. Both Geotextiles and Geogrids are used in this application in a composite application.
    • Roads Applications
    • Base Reinforcement
      • Geogrid Laydown
      • Arterial Road Reconstruction,
      • New Brunswick, Canada
      • 125,000 m2
    • Geogrid Illustration
    • Stabilization Through Separation
      Without Geotextiles With Geotextiles
      Typically woven geotextile would be used, but some specific applications would use non woven geotextile.
      About stabilization or reinforcement?
    • Part III
      Uses and Roles of
      Non Woven and Woven
    • Geotextiles are used in all five types of applications – filtration, containment, separation, reinforcement, drainage
      • Non-woven textiles are typically used for separation, filtration, and drainage and have a higher elongation.
      • Woven textiles are used as above, and additionally for filtration and containment due to a higher tensile strength in two directions, and a lesser elongation.
    • Comparison…..
    • Geotextiles used to reinforce slope,
      -filtration allows water to pass through the textile while the soils remain on the slope.
    • Applications for Reinforcement
    • Geotextiles used as a flitration layer between Atlantis™ stormwater systems. – allows water to pass through the system and restrains soil from passing.
    • Applications
      Textiles are universal in almost every construction project where water/soil separation is an issue.
      Our textiles come in various grades and strengths, to suit all construction needs and meet or drive competitive specifications.
      On applications for woven or nonwoven geotextiles?
    • Part IV - Containment
      Uses and Roles of
      Liners and Containment Systems
    • Containment….
      Environmental Applications
      Oil Fuel Storage
      Water storage
      Fertilizers storage
      Chemical Storage
      Mine tailings
      Municipal Waste Applications
    • Types of Liners
      High Density Polyethylene (HDPE) Membranes
      Low Linear Density Polyethylene (LLDPE)
      Geosynthetic Clay Liners (GCL)
      Ethylene Propylene Diene Terpolymner (EDPM)
      Poly Vinyl Chloride (PVC)
    • HDPE Liners
      Comes in varying thicknesses, from 0.5 to 3.5 mm (20 to 200mils). Can be smooth or textured finish.
      Rigid application, site preparation is a concern
      Typical HDPE applications include: agricultural lagoons, storm water ponds, chemical and industrial ponds, sewage lagoons, storage ponds and landfill caps.
    • HDPE Project
      PolyFlex 60mil HDPE smooth/Textured liner
      Tailings pond (contaminated gypsum)
      RedWater, AB
      340,000 m2
    • HDPE Project - Cont’d
    • LLDPE Liners
      LLDPE is a more flexible version of HDPE that can be prefabricated into large panels.
      greater flexibility than HDPE
      Suitable where differential or localized subgrade settlements are expected
      leach ponds, landfill closure caps or any application where elongation or puncture resistance is critical.
    • LLDPE Project
      PolyFlex 40mil LLDPE textured liner
      Clean Water Containment
      Strathmore, AB
      69,000 sft
    • LLDPE Project - Cont’d
    • GCL Liners
      GCLs are manufactured liners consisting of bentonite clays encased between layers of geotextile, providing an engineered alternative to a compacted clay liner (CCL).
      excellent sealing properties and unique self sealing attributes, reducing risk of failure due to adverse field and operating conditions.
      Most GCL projects can be installed using conventional equipment, and regular construction personnel.
      Landfill Liners Ponds and Lagoons Canals Storage Tanks/Secondary Containment
    • GCL Project
    • GCL Project
      CETCO GCL Liners
      • bentonite/textile composite based.
      • Water Reservoir application
      • Vernon, BC
      • 14,500 m2
    • GCL Project - Cont’d
    • Geocomposites
      Poly Flex
      Used in containment construction as collection or drainage
      Can be built as geonet, single sided composite, or double sided composite with any thickness of nonwoven geotextile
      On liners?
    • Summary
      Geosynthetics is a rapidly evolving field, with new uses being found every day.
      As the cost of labor increases, geosynthetics becomes a more viable alternative to conventional construction methods.
      Geosynthetics have many advantages to the environment.
    • Environmental Benefits
      Better utilization of resources over conventional construction – aggregate… asphalt...steel…fuels...labor
      Less disturbance to the earth
      Longer design lives
      Making things possible that were not before (IE – muskeg road applications)
      Cost savings – all applications.
    • Solutions...
      We are a solutions based provider. We provide project or customer -based solutions, using geosynthetics, and are available to assist at whatever level is required using the resources available to us.
      Thank You for your time!!